Service Pack 1 for Microsoft Office 2010 (SP1) is a great patch for Microsoft Office 2010 that corrects dozens of issues and adds new features to the suite's programs.
Amongst the most noteworthy changes that Service Pack 1 applies to Microsoft Office 2010 is the integration with Office 365 on Outlook 2010. OneNote, on the other hand, can sync its data with Windows Live OneDrive.
As far as the bugs corrected by Service Pack 1 for Microsoft Office 2010, Word works better with open formats and Powerpoint with second screens. And Excel is now more stable than it has ever been.
Choose your edition (32 or 64 bit)
Service Pack 1 for Office 2010 can be installed via Windows Update or manually with the installer provided by Microsoft. The only thing you should take into account is your Office edition, which may be 32 or 64 bit.
A necessary patch
Service Packs improve the stability, security and compatibility of Office applications. Take some time to apply the patch, your productivity will thank you for it. And if you don't need it, the installer will tell you (and this way you don't waste any time).